Where are my compiler warnings?

[drhex]

I've tried to check what the "const ptr" points to when no codeline assigns a value to it. It seems to point to the "hello" string anyway. Does g++ assign uninitialized "const char *"s to the first string in the data section or something?
I guess I'd better file a bug-report.

[gfunk]

Try compiling without the -O2 (which performs level 2 optimizations). It sounds like the code is just being optimized out.

[drhex]

According to the g++ man page, optimization is required for the compiler to be able to notice uninitialized variables.
I tried compiling with -O1 and without any -O, in neither case do I get a warning about "ptr may be used initialized".

[drhex]

There seems to be a lively discussion about how to handle uninitialized variables: http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings